Universal Fuel Compatibility: Approved for use with Natural Gas

when paired with stainless steel trim valves

As an essential part of the furnace drainage system

safeguarding sensitive low-voltage components against short circuits or thermal overloads

The EPDM elastomer ensures chemical resistance and thermal stability

Lochinvar & A.O. Smith 100208468 Control 322057-301 Universal Fuel Compatibility: Approved forThe Lochinvar & A. O. Smith 100208468 User Interface Control is a critical OEM replacement part engineered for precise management of commercial boiler and water heater systems. Designed to replace legacy part numbers RLY20031, RLY20031K, and 100167553, this control board serves as the primary communication hub between the technician and the appliance's internal logic. It is specifically calibrated for the Copper Fin II series, including models CF 402